brook gladstone john mcwhorter from columbia university, maria from pbs need to know. thank you all. thank you for joining us. we'll be back next weekend. saturday and sunday at 8:00 eastern time including tom stemberg the founder of staples, adviser in the romney campaign and nate silver, new author. >>> melissa harris-perry is up next. the roberts court could be ready to end it once and for all. what's at stake and who is at play. that's melissa harris-perry coming up next. we'll see you next week. have a great week here on "up." ♪ [ male announcer ] how do you turn an entrepreneur's dream... ♪ into a scooter that talks to the cloud? ♪ or make 70,000 trades a second... ♪ reach one customer at a time? ♪ how do you help doctors turn billions of bytes of shared information... ♪ into a fifth anniversary of remission? ♪ or turn 30-million artifacts... ♪ into a high-tech masterpiece? ♪ whatever your business challenge, dell has the technology and services to help you solve it.